Perhaps you should try some spelling variations:
hieu hien » bieu hien, chieu chien, dieu khien
trinh han » trinh quan
dieu hien » dieu khien, dieu kien, bieu hien
su sach » so sach, vu sach
thue va » thuc va, thuyet va, thuc vat
han cho » hang cho, han che, san cho
cho tre » cho thue, khoe tre
lang xa » lang ha, dang xay, lang van
hue va » nhue va, he va, hue ha

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach _ lang xa hoi. ((hieu hien) or (dieu hien)) bac ((hue va) or (thue va)) trinh han cho tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach _ lang xa hoi. ((hieu hien) OR (dieu hien)) bac ((hue va) OR (thue va)) trinh han cho tre.
• Adding a wildcard symbol may retrieve word variants: su sach _ lang xa hoi. ((hieu hien) or (dieu hien)) bac ((hue va) or (thue va)) trinh han cho tre*.